Re: IRON PATRIOT w.i.p. *UPDATE 8/14*
ummm... well i don't want to discourage you, but it's pretty rough all over. the lumpiness is the first issue. all of the surface should be sanded smooth and shouldn't have that lumpy, playdough texture to it. the face plate is actually almost on point. you should use that as reference to how smooth you want the rest of the helmet to look. start with a really course sandpaper and you'll start to get down to a workable surface in no time. after it's smoothed out you can move to a finer grit sandpaper which will start to get the surface even and smooth like glass. as you're sanding it you'll notice little areas where there are holes or pits in the bondo. you can mix up a small batch of bondo and use a credit card to apply it over the holes which will fill in the holes and still retain a fairly level surface. after it's all level and filled you take some fine sandpaper and use that to get the texture out that was left by the heavier grit sandpaper.
another issue to tackle is the edges of the entire piece. try using a medium grit sandpaper and run it along all of the edges of your piece (around the hole where the face opening is, the outside edges of the helmet, etc) and work those lines until they are straight and even with each other. another tool to use would be an exacto saw which you should be able to find at any hobby store. you can use this to trim the rough areas around the eyes and the more uneven areas around the outside edges of the helmet with more precision than a hobby knife or sandpaper.
hope that helps a little. keep working on it and it'll get there.